They are completely made in the USA down to the box, they are supplied with a real Accuseal clamp not a knock off accuseal or horseshoe style, they are made with USA made aluminized tubing, and the ends are formed and reduced in a manner that makes the sealing surfaces smoother and seal better. We have the other brands and let the customer see the difference in the shop or at the events we go to. Some of the brands you listed are better than others, but general rule thumb is the lower the price the lower the quality. We build these pipes to make Aaron @ Rudy's a less expensive pipe to ship compared to the one piece pipes we made before anyone else was build exhaust in this market. I still prefer the one pice pipe design, which we are still building in many sizes and configurations. By doing this the customer a pick the exhaust that they want like a Banks or Magnaflow for example and still get a DPF delete option. We also have a number of customers that previously purchased a filter back exhaust and now choose to go filter off. We also still offer pipes with Bungs or No Bungs, which in the salt belt we suggest running the sensors plugged in and installed so the wiring harnesses and plugs don't turn green.